Diesel Data: Automotive Repair

B1325



DTC B1325

CIRCUIT DESCRIPTION




The body control module (BCM) monitors the battery voltage through the VBATT1 circuit.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1325 Device Power 1 Circuit

CONDITIONS FOR RUNNING THE DTC
The voltage supplied to the BCM is in the range of 7-26 volts.

CONDITIONS FOR SETTING THE DTC
- The BCM detects a system voltage below 9 volts or above 18 volts.
- The above condition is present for at least 5 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The BCM immediately disables all outputs when a high voltage condition was detected, with the exception of the Run/Crank relay that is disabled after a 3 minute delay.
- The setting of other DTCs is inhibited.

CONDITIONS FOR CLEARING THE DTC
- A current DTC clears when the malfunction is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

TEST

Steps 1-9: